Here's the patch showing itself (also verified on the Nokia 700, so this isn't an 808-only thing):
You can check your Nokia 808, 700 or 701 for the update by going into SW Update as usual on the menu. Note that a device restart isn't needed.
Data points welcome on whether this improves the 808's stability in areas of low 3G signal. You may remember that Nokia Care Points had been adding a capacitor to the 808's motherboard to cope with some electronic aspect of 3.5G to 3G to 2G transitions, but it's probable that this software includes new timeouts and error handling such that a hardware modification isn't needed.
An exciting week, eh? I wonder what Symbian platform updates will arrive tomorrow!...